100% Browser-Based • No Upload • Free

Free Regex Tester Live Pattern Matching

Test and debug regular expressions with instant visual feedback. See matches highlighted in real-time, test against multiple strings, and refine your patterns.

Test Regex Free All Tools
No sign-up required to try • No files uploaded • Free forever

How It Works

1
Select or drop your file
2
Processed in your browser — nothing uploaded
3
Download the result — done!
Key Features

Why Use UniTrack Regex Tester

The fastest way to test and debug regular expressions — with instant visual feedback.

100% Private

Your files never leave your device. Everything is processed locally in your browser.

Instant Processing

No waiting for server uploads. Processing starts immediately using your device's power.

Unlimited & Free

No file limits, no watermarks, no hidden fees. Use as much as you want, forever free.

Your Data Never Leaves Your Browser

Unlike other online tools, we don't upload your files to our servers. Everything is processed using JavaScript directly in your browser. When you close the tab, your data is gone. Zero tracking, zero risk.

0
Server uploads
0
Data stored
0
Tracking
FAQ

Frequently Asked Questions

We use JavaScript's built-in RegExp engine, which supports standard regex syntax including lookaheads, named groups, Unicode properties, and more. It's compatible with most web and Node.js applications.

Yes! Toggle global (g), case-insensitive (i), multiline (m), dotAll (s), and unicode (u) flags. Matches update in real-time as you change flags.

Absolutely. All regex matching happens in your browser. Your patterns and test strings are never sent to any server.

Test Your Regex for Free

Debug regular expressions with live matching — no signup, no limits.

Test Regex Now Browse All Tools
No sign-up required 100% browser-based Free forever